72266821253 has 4 divisors (see below), whose sum is σ = 78836532288. Its totient is φ = 65697110220.

The previous prime is 72266821229. The next prime is 72266821259. The reversal of 72266821253 is 35212866227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72266821253 - 2⁶ = 72266821189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72266821259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3284855501 + ... + 3284855522.

It is an arithmetic number, because the mean of its divisors is an integer number (19709133072).

Almost surely, 2^72266821253 is an apocalyptic number.

It is an amenable number.

72266821253 is a deficient number, since it is larger than the sum of its proper divisors (6569711035).

72266821253 is a wasteful number, since it uses less digits than its factorization.

72266821253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6569711034.

The product of its digits is 483840, while the sum is 44.

The spelling of 72266821253 in words is "seventy-two billion, two hundred sixty-six million, eight hundred twenty-one thousand, two hundred fifty-three".